1998 Map of Silica Mountain

About this map

Calapooya Divide serves as the dominant geographical spine of this region, marking a significant drainage divide that separates the watershed systems of the Umpqua National Forest from the northern valleys. The map illustrates a high-altitude landscape defined by prominent peaks including Windy Mountain, Holderman Mountain, and Silica Mountain. A dense network of headwaters, such as Sharps Creek, Mosby Creek, and Dahl Creek, carves through the terrain, suggesting a history of active timber management and drainage control. The inclusion of the Fifth Standard Parallel South and numerous quarries scattered throughout the higher elevations indicates an area primarily utilized for industrial resource extraction and forest service operations rather than permanent residential settlement. This 1998 revision provides a clear look at the complex topography near the border of Lane and Douglas Counties, capturing the state of the forest's interior roads and water sources like Huckleberry Spring.